OSMUNDACEAE (Flowering Ferns) 

 OSMUNDA L. 



46 O. REGALis L. (Royal Fern.) Not rare. 



47 O. CLAYTONiANA L. (Interrupted Fern.) Common. 



48 O. ciNNAMOMEA L. (Cinnamon Fern.) Common. 



49 O. ciNNAM0ME.\, VAR. FRONDOSA Gray. Eddy Creek. Rare. 



OPHIOGLOSSACEAE (Adder Tongue) 

 OPHIOGLOSSUM L. 



50 O. VULGATUM L. Mrs. C. P. Davidson, farm in Greenfield Town- 



ship, Lackawanna County. Long Pond, Luzerne County. 

 Rare. 



BOTRYCHIUM (Moonwort) 



51 B. SIMPLEX Hitch. Naomi Pines. Rare. 



52 B. LANCEOLATUM, VAR. ANGUSTisEGMENTUM Pcase and Moore. 



Stillwater, Lake Scranton gorge. Rare. 



53 B. RAMosuM Aschers. Stillwater. Rare. 



54 B. OBLIQUUM Muhl. Birdseye, Spring Brook. Common. 



55 B. OBLIQUUM, VAR. DissECTUM Clutc. Wavcrly, Birdseye, not rare 



along O. and W. railroad. 



56 B. viRGiNiANUM Sw. (Rattlesnake Fern.) Common. 



EQUISETACEAE 

 EQUISETUM L. (Horsetail) 



57 E. ARVENSE L. Common. 



58 E. ARVENSE FORM DECUMBENs W. N. Clute. Factory ville along rail- 



road tracks. Common. (See Clute's Ferns and Fern Allies.) 

 Railroad embankments.* 



59 E. ARVENSE FORM DiFFUsuM Clute. La Plume. Common along rail- 



road embankments.* 



60 E. s'i'LVATicuM L. Orson. Kingston, Rocky Glen. 



61 E. FLUviATiLE L. Wyoming, Pocono. Not common. 



62 E. HYEMALE L. (Scouring Rush.) Wyoming, Spring Brook. Along 



creek near Fleetville. 



LYCOPODIACEAE 

 LYCOPODIUM L. (Club Moss) 



63 L. SELAGO L. Delaware Water Gap. Rare. 



64 L. LuciDULUM Michx. Lake Scranton woods. Frequent. 



65 L. INUNDATUM L. Spring Brook, Moscow. 



66 L. INUNDATUM, VAR. BiGELovii Tuck. Moosic Lake. 



67 L. ANNOTiNUM L. Moscow. Rare. 



68 L. ANNOTINUM, VAR. ACRiFOLiuM. Reported by Prof. J. W. Harsh- 



berger on the Pocono Plateau July 25, 1904. Rhodora, Tune, 

 1915.* 



69 L. CLAVATUM L. Frequent. 



70 L. OBSCURUM L. Common. 



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